{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:ZWAUOX4HYQNAOTYDWMZB2CTPO5","short_pith_number":"pith:ZWAUOX4H","schema_version":"1.0","canonical_sha256":"cd81475f87c41a074f03b3321d0a6f775b94ade8a8a75a3e05dda2337f6a2fa7","source":{"kind":"arxiv","id":"2305.04321","version":2},"attestation_state":"computed","paper":{"title":"Traversable Morris-Thorne-Buchdahl wormholes in quadratic gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Hoang Ky Nguyen, Mustapha Azreg-A\\\"inou","submitted_at":"2023-05-07T16:09:16Z","abstract_excerpt":"The special Buchdahl-inspired metric obtained in a recent paper [Phys. Rev. D 107, 104008 (2023)] describes asymptotically flat spacetimes in pure $\\mathcal{R}^{2}$ gravity. The metric depends on a new (Buchdahl) parameter $\\tilde{k}$ of higher-derivative characteristic, and recovers the Schwarzschild metric when $\\tilde{k}=0$. It is shown that the special Buchdahl-inspired metric supports a two-way traversable Morris-Thorne wormhole for $\\tilde{k}\\in(-1,0)$ in which case the Weak Energy Condition is formally violated, a naked singularity for $\\tilde{k}\\in(-\\infty,-1)\\cup(0,+\\infty)$, and a no"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2305.04321","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2023-05-07T16:09:16Z","cross_cats_sorted":[],"title_canon_sha256":"6cecded1ae10237baa0720d0933039ffa3480ef2803418da4d4356baf8bfbf55","abstract_canon_sha256":"e24a6cefd1e54a82e987fa8de04b12f99d4d45e52cd63ad22e61e56a833de3b1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:34:05.602421Z","signature_b64":"AabE+pUcJ4eVpOpoS2X6Kx4SGSsUp7ArVwHuubjLLgv6cl1ACgBESOyrElyUIud8BEX07KMyup0QQ9FpPul3BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cd81475f87c41a074f03b3321d0a6f775b94ade8a8a75a3e05dda2337f6a2fa7","last_reissued_at":"2026-07-05T06:34:05.601936Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:34:05.601936Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Traversable Morris-Thorne-Buchdahl wormholes in quadratic gravity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Hoang Ky Nguyen, Mustapha Azreg-A\\\"inou","submitted_at":"2023-05-07T16:09:16Z","abstract_excerpt":"The special Buchdahl-inspired metric obtained in a recent paper [Phys. Rev. D 107, 104008 (2023)] describes asymptotically flat spacetimes in pure $\\mathcal{R}^{2}$ gravity. The metric depends on a new (Buchdahl) parameter $\\tilde{k}$ of higher-derivative characteristic, and recovers the Schwarzschild metric when $\\tilde{k}=0$. It is shown that the special Buchdahl-inspired metric supports a two-way traversable Morris-Thorne wormhole for $\\tilde{k}\\in(-1,0)$ in which case the Weak Energy Condition is formally violated, a naked singularity for $\\tilde{k}\\in(-\\infty,-1)\\cup(0,+\\infty)$, and a no"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2305.04321","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2305.04321/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"2305.04321","created_at":"2026-07-05T06:34:05.601999+00:00"},{"alias_kind":"arxiv_version","alias_value":"2305.04321v2","created_at":"2026-07-05T06:34:05.601999+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2305.04321","created_at":"2026-07-05T06:34:05.601999+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZWAUOX4HYQNA","created_at":"2026-07-05T06:34:05.601999+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZWAUOX4HYQNAOTYD","created_at":"2026-07-05T06:34:05.601999+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZWAUOX4H","created_at":"2026-07-05T06:34:05.601999+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2507.10198","citing_title":"Epicyclic oscillations and accretion disk around a special Buchdahl-inspired spacetime","ref_index":16,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ZWAUOX4HYQNAOTYDWMZB2CTPO5","json":"https://pith.science/pith/ZWAUOX4HYQNAOTYDWMZB2CTPO5.json","graph_json":"https://pith.science/api/pith-number/ZWAUOX4HYQNAOTYDWMZB2CTPO5/graph.json","events_json":"https://pith.science/api/pith-number/ZWAUOX4HYQNAOTYDWMZB2CTPO5/events.json","paper":"https://pith.science/paper/ZWAUOX4H"},"agent_actions":{"view_html":"https://pith.science/pith/ZWAUOX4HYQNAOTYDWMZB2CTPO5","download_json":"https://pith.science/pith/ZWAUOX4HYQNAOTYDWMZB2CTPO5.json","view_paper":"https://pith.science/paper/ZWAUOX4H","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2305.04321&json=true","fetch_graph":"https://pith.science/api/pith-number/ZWAUOX4HYQNAOTYDWMZB2CTPO5/graph.json","fetch_events":"https://pith.science/api/pith-number/ZWAUOX4HYQNAOTYDWMZB2CTPO5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZWAUOX4HYQNAOTYDWMZB2CTPO5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZWAUOX4HYQNAOTYDWMZB2CTPO5/action/storage_attestation","attest_author":"https://pith.science/pith/ZWAUOX4HYQNAOTYDWMZB2CTPO5/action/author_attestation","sign_citation":"https://pith.science/pith/ZWAUOX4HYQNAOTYDWMZB2CTPO5/action/citation_signature","submit_replication":"https://pith.science/pith/ZWAUOX4HYQNAOTYDWMZB2CTPO5/action/replication_record"}},"created_at":"2026-07-05T06:34:05.601999+00:00","updated_at":"2026-07-05T06:34:05.601999+00:00"}